Grease pump



Feb. 2 1926.

A. M. MCSFADDEN GREASE PUMP Filed Jan. ll, 1922 Patented Feb. 2, 192s.

UNITED STATES PATENT OFFICE.

l AUBELIoUs M. MosrAnDnN, or s'r. Louis, mssounr.

GREASE PUMP.

Application lled. January 11, 1922. Serial No.' 528,515.

pump which is adapted to be used with a.

grease container in the forgn of a cylinder which operates as a part of the pump when set up to co-operate with the pump plunger. Pumps of this type are very useful around garages or similar establishments for forcing grease into crank cases or grease cups.

The general object ofthe invention is to provide a grease pump having a cylinder which is the container in which the grease is delivered to the garage, or other establishment using the pump, and to provide a cooperating construction for the pum and container whiclrwill enable the container to be readily handled without injury; and

which will facilitate the placing and securing of the container in position to co-operate with the plunger of the pump; also to provide an improved roller mounting for the base-plate of the ump which will facilitate its being moved rom place to place in the garage, but so constructed as to overcome any tendency of the rollers to permit the pump to slide or skid when it is being operated; another object of the invention is to construct the container or pump cylinder so that it can stand upright on the floor if desired.

Further objects of the invention will appear hereinafter.

The invention consists in the novel features, and in the general combination of parts to be particularly described hereinafter," all of which contribute to produce a simple and leiicient grease pump. A preferred embodiment of my invention will be particularly described in the following 'specification, while the broad scope of my invention will be pointed out in the appended claims.

In the drawing,

Figure 1 is a side elevation and partial section through the pump embodying my invention; 1

Figure 2 is a plan of the pump shown in Figure 1; Figure 3 is a vertical section upon an enlarged scale through the pump, taken about on the line 3-3 of Figure 2; and

Figure 4 is a vertical section-taken through the bottom of the pump cylinder or grease container and showing the same with its closure secured in lace.

The pump inclu esa baselate 1 which may have four arms 2 projectlng outwardly from the central portion of the base-plate, at which point an elevated seat 3 is provided to receive the lower end of a cylindrical vcontainer 4. This seat has a cylindrical side face 5. Tl'e container 4 consists of a cylindrical shell 6, the lower end of which projects downwardly and extends over the cylindrical face 5, and the cylinder is provided with a countersunk head 7 which is adapted to rest flat upon the seat 3 (see Figures 1 and 3). Thenhead is provided with an outlet nipple`8 which is preferably located centrally on the head, and the body of this nipple 1s substantially conical so as to be received upon a conical counterbore 9 which is formed at the center of the seat 3. The lower end of the nipple terminates in a threaded neck 10 Jfor a purpose which will appear hereinafter. The base-plate supports a frame 11 which may include two or more standards 12 which are simply stems or rods, the lower ends of which are secured to the base-plate in such a way that these bars 12 are parallel to the axis of the cylinder or container 4 when it has been applied to the seat. The frame includes an upper frame 13 which is mounted on the upper ends of the standards 12 and o crates as a guide for a stem or rod 14 which extends up from a pump plunger or piston 15 which is adapted to fit the bore of the container, as a 1piston fits its cylinder.

Any suita le means may be forcin the plunger down intot e container. For t is purpose the stem 14 may be threaded so as to co-operate with the nut 16 through which it passes, the nut being rigid with a bevel gear 17 which may be rotated by a pinion 18 carried by a shaft 19to which a crank 20 is attached so as to rotateA in a vertical plane.

rovided for i lengaging and holding the upper end of the container when it is co-operating with the plunger 15. This means is preferably in the form of a cross-head 21 which is guided to slide on the standards 12 toward or from the seat 3, and this cross-head may be provided with a set screw 22 for securing it in position. Its central portion is provided with a conical-bore 23 and a counter-bore 24 to lit the upper end of the cylindrical shell 6.

When the gear wheel 17 and nut 16 are being rotated, the stem 14 is prevented from rotating by means of a fixed feather or tongue 25 which runs in a longitudinal groove or slot 26 extending along the stem, and in order to enable the amount of grease ejected from the pump to. be measured, I provide the stem 14 with a collar 27 which may be adjustably clamped at any point by means of a set screw 28 itting in the groove 26. This collar 27 carries a scale 29 which extends longitudinally with the stem and is graduated so as to indicate units of measure, for example, pints or pounds. This scale may be guided through openings 30 formed in the upper frame 13 and cooperates with a small pointer 31 mounted on the frame at a convenient point (see Fig. 1).

The counter-bore 9 is formed on a duct 32 which passes downwardly through the seat and extends laterally therein, terminating at the side in a delivery nipple 33 to which a flexible hose 34 may be attached.

By reason of the fact that the head 7 at the bottom of the container is countersunk, the container can rest upon the floor 35 in an upright position (see Fig. 4), that is to say, the cylindrical shell 6 extends down beyond the head 7 a sufficient distance to hold the nipple clear of the iloor, even while the nipple 1s carrying a cap 36 which screws upon the threads 10 referred to above. It should be understood that these containers are furnished to the garage, full of grease with the cap or closure 36 in place and with a removable cover, not illustrated, on the upper end ofthe shell 6. When lit is desired to use the grease it is simply necessary to remove the cover of the can or container and also the screw cap 36 and then set the container in position, as illustrated in Figure 1.

The seat 3 extends up suiiiciently to prevent any possibility of the weight of the container coming upon the lower edge of the shell. In other words, the principal part of the weight exerts itselt` as pressure developed between the conical nipple 8 and the .conical seat 9. Hence, when pressure 1s developed in the grease within the container, this pressure between the nipple and the counter-bore 9 will vtend to prevent any grease from finding exit at the base of the can. Of course, such an escape of the grease screw 22. The plunger is then advanced until it forces the grease to the outlet end of the hose; the scale 29 should then beadjusted so that it indicates zero and the crank 20 should be turned again so as to deliver as much grease as the purchaser desires.

I provide improved means for mounting the pump on rollers which will facilitate its being moved from place to place around a garage, but the rollers are mounted in such a way that they will not increase the mobility of the pump when the crank 20 is being rotated. For this pur ose I prefer to let the base-plate rest direct y upon the floor at one side of the container, for which purpose I may provide -it with short feet or legs 37. On the other side I provide the base-plate with a pair of rollers 38 and these rollers are mounted so that they rotate in a plane transverse to the plane in which the crank 20 swings. Hence, when the crank is rotated they do not tend to rotate, and hence they give substantially the same effect as though they were constructed like the feet 37, because any tendency of the crank to move the pump is exerted in a plane at right angles to the plane of rotation of the wheel or roller.

While it is not necessary for the plane of rotation of these rollers to be'exactly at right angles to the plane of rotation of the crank, nevertheless, I prefer to mount them so that they are in a plane substantially at `right angles to the plane in which the crank swings.

At a convenient point the base-plate is provided with a foot plate 39 (see Figure 2) upon which the operator of the pump may exert pressure with his foot in order to hold the base-plate securely in position when the crank is eing rotated.

What I claim is:

1. In a grease pump, the combination of a base-plate, a cylinder supported thereon, a hose connected with the lower end of the cylinder, a frame, a plunger guided in the frame, means for forcing-the plunger down into the cylinder, including a crank mounted to swing in a substantially vertical plane, and rollers carried by the base-plate for supporting the same on the floor, and mounted to rotate in a plane transverse to the plane of rotation of the crank.

2. In a grease pump, the combination of a hase-plate, a cylinder supported thereon, u hose connected with the vlower end of the cylinder, a frame, a plunger guided in the frame, means for forcing the plunger down into the cylinder, including a crank mounted to swing in a substantially vertical plane, said base-plate constructed to rest upon the oor at one side of the container and having a pair of rollers at the opposite side of the container for supporting the base-plate on 10 `the floor, said ,rollers being' mounted to rotate in a plane substantially at right angles to the plane of rotation of the crank. In testimony whereof, I have hereunto set my hand.

AURELIOUS M. MGSPADDEN. 

